Clean up many small dependencies (part 3) (#8425)

Follow-up to #8353

Release Notes:
- N/A

crates/language_tools/Cargo.toml

@@ -18,7 +18,6 @@ gpui.workspace = true
 language.workspace = true
 lsp.workspace = true
 project.workspace = true
-serde.workspace = true
 serde_json.workspace = true
 settings.workspace = true
 theme.workspace = true
@@ -33,5 +32,4 @@ editor = { workspace = true, features = ["test-support"] }
 release_channel.workspace = true
 env_logger.workspace = true
 gpui = { workspace = true, features = ["test-support"] }
-unindent.workspace = true
 util = { workspace = true, features = ["test-support"] }